[R] Using PLYR to apply a custom function to a data frame

ramoss ramine.mossadegh at finra.org
Wed Apr 10 20:56:09 CEST 2013

Thanks everyone. The mutate function worked great:

all2<- mutate(all1,upper=p75+1.5*(p75-p25),lower=p25-1.5*(p75-p25))

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